diff --git a/code/COB/COBLoader.cpp b/code/COB/COBLoader.cpp
index 7b82ab662..8e7c81192 100644
--- a/code/COB/COBLoader.cpp
+++ b/code/COB/COBLoader.cpp
@@ -250,7 +250,7 @@ aiNode* COBImporter::BuildNodes(const Node& root,const Scene& scin,aiScene* fill
         const Mesh& ndmesh = (const Mesh&)(root);
         if (ndmesh.vertex_positions.size() && ndmesh.texture_coords.size()) {
 
-            typedef std::pair<unsigned int,Mesh::FaceRefList> Entry;
+            typedef std::pair<const unsigned int,Mesh::FaceRefList> Entry;
             for(const Entry& reflist : ndmesh.temp_map) {
                 {   // create mesh
                     size_t n = 0;
diff --git a/code/Common/SceneCombiner.cpp b/code/Common/SceneCombiner.cpp
index 9471907de..29b6082a8 100644
--- a/code/Common/SceneCombiner.cpp
+++ b/code/Common/SceneCombiner.cpp
@@ -1312,7 +1312,6 @@ void SceneCombiner::Copy(aiMetadata** _dest, const aiMetadata* src) {
     aiMetadata* dest = *_dest = aiMetadata::Alloc( src->mNumProperties );
     std::copy(src->mKeys, src->mKeys + src->mNumProperties, dest->mKeys);
 
-    dest->mValues = new aiMetadataEntry[src->mNumProperties];
     for (unsigned int i = 0; i < src->mNumProperties; ++i) {
         aiMetadataEntry& in = src->mValues[i];
         aiMetadataEntry& out = dest->mValues[i];
diff --git a/code/FBX/FBXMeshGeometry.cpp b/code/FBX/FBXMeshGeometry.cpp
index 70e35ccb3..2f2782182 100644
--- a/code/FBX/FBXMeshGeometry.cpp
+++ b/code/FBX/FBXMeshGeometry.cpp
@@ -448,6 +448,12 @@ void ResolveVertexDataArray(std::vector<T>& data_out, const Scope& source,
         std::vector<T> tempData;
 		ParseVectorDataArray(tempData, GetRequiredElement(source, dataElementName));
 
+        if (tempData.size() != vertex_count) {
+            FBXImporter::LogError(Formatter::format("length of input data unexpected for ByVertice mapping: ")
+                                  << tempData.size() << ", expected " << vertex_count);
+            return;
+        }
+
         data_out.resize(vertex_count);
 		for (size_t i = 0, e = tempData.size(); i < e; ++i) {
 
@@ -461,10 +467,17 @@ void ResolveVertexDataArray(std::vector<T>& data_out, const Scope& source,
 		std::vector<T> tempData;
 		ParseVectorDataArray(tempData, GetRequiredElement(source, dataElementName));
 
-        data_out.resize(vertex_count);
-
         std::vector<int> uvIndices;
         ParseVectorDataArray(uvIndices,GetRequiredElement(source,indexDataElementName));
+
+        if (uvIndices.size() != vertex_count) {
+            FBXImporter::LogError(Formatter::format("length of input data unexpected for ByVertice mapping: ")
+                                  << uvIndices.size() << ", expected " << vertex_count);
+            return;
+        }
+
+        data_out.resize(vertex_count);
+
         for (size_t i = 0, e = uvIndices.size(); i < e; ++i) {
 
             const unsigned int istart = mapping_offsets[i], iend = istart + mapping_counts[i];
@@ -493,16 +506,17 @@ void ResolveVertexDataArray(std::vector<T>& data_out, const Scope& source,
 		std::vector<T> tempData;
 		ParseVectorDataArray(tempData, GetRequiredElement(source, dataElementName));
 
-        data_out.resize(vertex_count);
-
         std::vector<int> uvIndices;
         ParseVectorDataArray(uvIndices,GetRequiredElement(source,indexDataElementName));
 
         if (uvIndices.size() != vertex_count) {
-            FBXImporter::LogError("length of input data unexpected for ByPolygonVertex mapping");
+            FBXImporter::LogError(Formatter::format("length of input data unexpected for ByPolygonVertex mapping: ")
+                                  << uvIndices.size() << ", expected " << vertex_count);
             return;
         }
 
+        data_out.resize(vertex_count);
+
         const T empty;
         unsigned int next = 0;
         for(int i : uvIndices) {
diff --git a/code/Importer/IFC/IFCCurve.cpp b/code/Importer/IFC/IFCCurve.cpp
index 6ff330052..b16df9c5c 100644
--- a/code/Importer/IFC/IFCCurve.cpp
+++ b/code/Importer/IFC/IFCCurve.cpp
@@ -323,7 +323,7 @@ public:
         // oh well.
         bool have_param = false, have_point = false;
         IfcVector3 point;
-        for(const Entry sel :entity.Trim1) {
+        for(const Entry& sel :entity.Trim1) {
             if (const ::Assimp::STEP::EXPRESS::REAL* const r = sel->ToPtr<::Assimp::STEP::EXPRESS::REAL>()) {
                 range.first = *r;
                 have_param = true;
@@ -340,7 +340,7 @@ public:
             }
         }
         have_param = false, have_point = false;
-        for(const Entry sel :entity.Trim2) {
+        for(const Entry& sel :entity.Trim2) {
             if (const ::Assimp::STEP::EXPRESS::REAL* const r = sel->ToPtr<::Assimp::STEP::EXPRESS::REAL>()) {
                 range.second = *r;
                 have_param = true;
diff --git a/code/MDL/MDLLoader.cpp b/code/MDL/MDLLoader.cpp
index 21a6bc29b..11c6e3ecb 100644
--- a/code/MDL/MDLLoader.cpp
+++ b/code/MDL/MDLLoader.cpp
@@ -1421,11 +1421,11 @@ void MDLImporter::InternReadFile_3DGS_MDL7( )
         avOutList[i].reserve(3);
 
     // buffer to held the names of all groups in the file
-	const size_t buffersize( AI_MDL7_MAX_GROUPNAMESIZE*pcHeader->groups_num );
-	char* aszGroupNameBuffer = new char[ buffersize ];
+    const size_t buffersize(AI_MDL7_MAX_GROUPNAMESIZE*pcHeader->groups_num);
+    char* aszGroupNameBuffer = new char[ buffersize ];
 
     // read all groups
-    for (unsigned int iGroup = 0; iGroup < (unsigned int)pcHeader->groups_num;++iGroup) {
+    for (unsigned int iGroup = 0; iGroup < (unsigned int)pcHeader->groups_num; ++iGroup) {
         MDL::IntGroupInfo_MDL7 groupInfo((BE_NCONST MDL::Group_MDL7*)szCurrent,iGroup);
         szCurrent = (const unsigned char*)(groupInfo.pcGroup+1);
 
diff --git a/code/XGL/XGLLoader.cpp b/code/XGL/XGLLoader.cpp
index 24ed5d57c..403205e03 100644
--- a/code/XGL/XGLLoader.cpp
+++ b/code/XGL/XGLLoader.cpp
@@ -685,7 +685,7 @@ bool XGLImporter::ReadMesh(TempScope& scope)
     }
 
     // finally extract output meshes and add them to the scope
-    typedef std::pair<unsigned int, TempMaterialMesh> pairt;
+    typedef std::pair<const unsigned int, TempMaterialMesh> pairt;
     for(const pairt& p : bymat) {
         aiMesh* const m  = ToOutputMesh(p.second);
         scope.meshes_linear.push_back(m);